Concrete-floor form



Sept. 23 1924..

35095253 R. c. PHELPS CONCRETE FLooa- FORM Filed aan. l2, 1924.

3 Sheets-Sheet 1 "'f' ad! 'R'. C.'PHELPS CONCRETE FLOOR FORM Sept. 23

3 Sheets-Sheet '2 Filed Jan. 2, 1924 Sept. '23 1924.

' R. C. PHELPS CONCRETE FLOOR FORM Filed Jan. 2, '1924 3 sheets-sham 5 A l I L 1 A. y. 2 a 1 M 1 n n half Patented Sept. Z3, 1924;.

nari" RAYMONDFC. PHELPS, .LOS ANGELES, CALEFORNIA.

CONCRETE-FLGE FORM/It Application filed January 2, 1924. Serial No. 683,927.

To all 'whom it may concern:

Be it known that I, RAYMOND C. PHELPS. a citizen of the United States, residing in the city ofLos Angeles, in the county of Los Angeles and `State of California, have invented a nen7 and useful Improvement in Concrete-Floor Forms, of which the following is a specification.

`My invention relates to improvements in forms for concrete Vfloors and the like wherein form pans are arranged to be mounted upon a. supporting structure as a mold for laying the Hoor and joist and are adapted to be removed Without the supporting structure. i

The primary object of my invention is to provide an improved forni for concrete floors. `1 y Another object is to provide an improved form adapted` to facilitatethe removal of form pans wit-hout disturbing the supporting structure upon Which the forms and floor are laid.

A' further object is to provide an im-V proved device of the character described adapted to facilitate the initialV placing of the form pans. y p

A still` further object is to provide a device adapted to reduceV the amount of lumber and labor necessary for building a supporting structure, and to reduce the labor and Waste oflumber in dismantling such structure after the vdoor has been completed. y

l accomplish these and other objects by means of the device disclosed in the drawings forming a part of the present specification wherein like characters of reference are used to designatei similar parts throughoutsaid specification and drawings `and in which, i

Fig. l is a broken plan view of my im-v proved Vdoor form showing the manner in which the floor is laid thereon.

Fig. 2 is a broken transverse section of a section of floor as applied upon my improved floor form.

Fig. 3 is a broken.longitudinal section of a section of floor as applied upon my floor form.

Fig. 4 is a perspective view of a form pan.

Fig. 5 is a sectional detail showing the preferred manner in Which the pans are Secured to the supportingstructure.

Fig. 6 is a longitudinal section similar to tween beams.

that shown in Fig. 3 with the form pans removed.

ln laying concrete floors the common practice heretofore has been to build a supporting structure consisting of a plurality of supporting beams arranged transversely to the joist of the floor to be formed, said beams being supported upon uprights. Above the beams is built a superstructure consisting of a plurality of beams running with floor joist and supported upon uprights carried by the lower beams. Form pans having side portions are `secured directly to the sides of the beams by means of special nails, the sideportions being nailed to i the adjacent sides `of adjacent beams so that the pans span the spaces bev The floor joist are dened by the side portions of the `pans and the upper surfaces of the beams, the concrete being poured directly onto the top ofthe beams, and over the pans to obtain the desired thickness of Hoor. Theconcrete `is allowed to set for a period of about four days after which the nails are drawn and the pans loosened and removed from under the floor, the supporting structure being left standing for a period of about three Weeks to permit the thorough hardening of the concrete. i

The present practice above outlined is objectionable because of the excessive quantity of lumber necessary to construct the supportingstructure due to the use of both transverse and longitudinal beams, and also because of the amount of labor required to build such structure. An excessive amount of labor is also required to place the pans as Workmen must operate both from above and below the supporting structure in order to place an d secure the pans in position. EX- cessive labor is also required in removing the pendently and the longitudinal beams interfere. with the loosening of the pans from the concrete. The dismantling of the superstructure also `requires a considerable amount of labor, andas the concrete 4is placed in direct Contact with the upper surfaces of the longitudinalbeams to Whichthe `concrete sticks more tightly than to metal the separation of the beams from the concrete requires excessive labor and frequently results 1n damaging the beams to such an extent as to render them unfit for` further use.

`pans as the nails must each be drawn indelpositions diverging slightly -from p'erpen dicul'ar relation to" the body of the. sheet. The side portions 3 ot each pan 1 1s further bent to forman outwardly disposed lateral Y extension" d substantially parallel to the body ot'V the' sheet. A flange.' 6 is formed along the outer edge ot the lateral portion et by upwardly bending` the edge ot the side por- .tiong 2 of an adjacent pan 1 for a purpose hereinafter more fullyvv explained.

Thetorm pans 1 are mounted upon a suitable supporting" structure consisting ot a plurality ot supporting beams 7 carried upon suitable upright supports 8. The

1. beamsv 7 are spaced apart a distance slightly greater than the length ot the 3ans `1. Blocks 9, or other suitable supporting elements. are secured upon the' sides ot the beams Tto' engage and support the endsvof y the for-m' pans 1,- the ends of the pans being held clear of the sides of the beams 7 to permit the removal of the pans Without disturbing the support-ing structure as hereinafter explained.

Auxiliary pans 11 are supported directly above thebeains 7 said pans 1l. being ot' the same lcross section as tlie form pans 1, but of' a Width only slightly greater than the Width vof the beams 7v so as to lap slightly onto the adjacent ends of the form pans 1 as best shown in F ig. 3 ot the drawings.

lin constructing my improved floor form, the supporting structure is lirst built7 the beanie T being leveled to give the desi-red depth of floorm'a'nd Hoor joist in any convenient manner, said beamsv ,being regularly spaced at a distance slightly greater than the length' of the' pans 1, as above explained. The blocks 9 are then nailed or otherwise secured upon the sides ot the beams 7 at theipoints Where the floor joist are to be found. The pans 1 `are placed upon the supporting structure with the ends ot the laterallydisposed portions 4 of the pans lrestingupon and supported by the blocks 9, and the flange of each pan interlapping the edge of the side' portion` 2 of an adjacent pan 14 asbest shoWnin Fig. 2 of the drawings. lThel auxiliary pans 11 are then placed .-directly over the beams, the 'edges of the pans "11 lappingabove the adjacent edges v of the pans 1 thereby spanning the space between the ends ol said pans 1.7. In order to hold the pans-securely in place, apertures 12- are formed adjacent the edges of the laterally "disposedportions 4 of the pans 1,

directly over the blocks 9. Corresponding apertures 13 fare formed in the auxiliary pans 11 to register with the"` apertures 12 whereby the lapping edges may be secured i to the blocks 9 by means of a single nail or other securing element 14.

When the pans 1 and 11 have been` placed upon the supporting' structure as above eX- plained the interlapping side portions oi' the pans t'orm depressions defining the joist for Weight ot the concrete. Reintorcingbars 16V are commonly placed in spaced relationl vvith'- in the depressions in the form to be em-l bedded Witliin the concrete when poured thereby strengthening thelloor joist. Aper tures 15 are formed in the'tops of the pans l to admit Wires, not slunvn7 by which ceiling material may later be secured to the under side of the floor'. Y After the concrete has been allowed to set for a period of Ytour days, as in the present practice,` the form pans" are removed and maybe used in the structure of suc# cessi've {too-rs. ln my improved floor form this is accomplishedl by removing the'blocls Strom the sides of the beams 7 which in the arrangement shown inthe drawings is readily accomplished by prying off the blocks,i said blocks at the same Jtime being moved out ot engagement with the"l securing element 14. The form-pans 1 may now be pried loose from therconcrete Without disturbing the beams 7 and supporting structureq as theV ends of the :pans 1 clear the sides ot the beams. The supporting structure is allowed to stand for about three Weeks as in the presentj jractice7 the aux iliary pans 11 being allov'ed t remain in position until the supporting frame is dismantled at which time the pansar'e loosened from the concrete and preserved tor Jfuture use. The pans are sprayed with oil prior to the pouring of the `concrete to prevent the concrete trom sticking lto the pans, thereby j )ermittin'g the metal pans to be separated easily troni the hardened concrete.V

ltivill be noted that in my improved floor form the supporting structure consists only ot' a single series of supporting beams' 7 which are arranged 'traiisversely vto the joist, and that the concrete. does not come in direct Contact with any portion of the supporting structure but is molded entirely Within the metal 'form pans 1 and l1. These pointsv are ot particular importance because of the tact that in this Inainier` l am able' to eliminate the superstructure and longitwlinal beams used in common'l prac.-

lll)

tice, thereby effecting: a substantial savine' both inmaterial and labor: As` explained j above, the metal ,is readily loosened from the concrete.y but the wooden beamscannot e so readlly loosened and I am able to avoid thelabor and loss of material. The

. supporting elements V9 may be pried loose and the securing means therefor removed with much less labor than is involved in the drawinga of the plurality of nails commonly used. Furthermore, the initial placing of the form pans may `be accomplished with much greater economy of time and labor than the pans now in common usage, as workmen may accomplish the entire placing and securing from above without auf,T assistance from below the form.

Another point of particular importance is that the ylateral extension 4t maybe designed to give any required width to the Hoor joist 17. In general practice, a width "of Jfour and a halt inches for the joist is ferred embodiment` of invention it .is

understood that various modifications as to form and arrangement maybe made with- `0ut de artinof from the s irit of my invention and I therefore desire to avail myself of all such modifications as may fallwithin the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secureby Letters Patent is-` i l, .A concrete floor form comprising: the combination with a supporting`- structure consisting' of a plurality of spaced transverse supportingr beams` of a, plurality of form pans having interlapping longitudinal edges-forming depressions defining fioor joist; supporting elements detachably connected to the supporting` structure to engage andsnpport the ends ot' the pans clear of the edges of the supporting` beams whereby the pans may be removed without disturbine' the supporting structnregand auxiliary pans Vsupported above the beams and spanning the space between the adjacent ends of the form pans. j K

2. A concrete floor form comprising the combination with a supporting structure consisting' of a plurality of spaced transverse supporting beams, of. a plurality of' form pans having interlapping longitudinal forming depressions defining floor supporting elements detachably connected to the supporting structure to engage and support the ends ol the pans clear of the ed of the supporting` beams whereby the pans may be removed without disturbing the suuportine' structure; auxiliary pans supper i above the beams, said pans lapping` the z jacent ends of the form pans;I and means for securing the overlappingedges ot' the auxiliary pans and the form pans to the supporting members. Y

3. A concrete floor form comprising` the combination with a supporting` structure consisting; of a plurality of spaced supportini;r beams,` of a plurality of form pans bavinter downwardly turned longitudinal edges one ot which is provided with a laterally.v extending` portion arranged to engage thc opposite edge of an adjacent nan to hold said edges in interlapping relation to define eds joie joist extending transversely to the supportingr beams; supporting elements detachably secured uponv the supportnmstructure to engage and support the ends of the pans ,clear of the sides of the supportingr beams `whereby the pans may be removed without disturbing the ,supporting structure; an?

auxiliary pans supported above the beams,

said auxiliary pans being shaped to conform to the form pans and to lap the adjacent ends of said form pans.

4t. A concrete floor form comjnisinnl thi` combination with a supporting structure consistingV of a plurality of spaced supporting beams, of a plurality of Jforni pans of a length slightly less than the space between supporting beams, said pans having' downvwardly turned longitudinal edges adapted to interlap to define floor joist arranged transversely to the supporting` beams: blocks removably secured upon the sides of the beams to engage and support the ende of the form pans clear of the sides of said beams, whereby said pans may be ren/loved `without disturbing the supporting structure i and auxiliary pans shaped to conform to the shape of the Jform paus and arrrngzed to extend across the supportina` beams to lap the adjacent ends of the toi-m pans.

A concrete floor form "oi'nprisinp the combination with a. supporting structure consisting); of, a plurality oft spaced supportingr bea-ms` of a plurality of form pans o a lenpgth slightly less than the space between supporting beams said pans havinfr downwardly turned longitudinal edges adapted to interlap to define door joist arranged transversely to the supporting` beams; blocks removably secured upon the sides of the beams to engage and support the ends of the form pans clear of the sides of said beams, whereby said pans may be removed without disturbing the supporting struckso ture; and auxiliary pans shaped to' con`- form to the shape of the form pans and au ranged to extend across the supporting beamsy to lap the adjacent ends of the form pans; and means for securing the lapping edges of the form pans and the auxiliary pans to the supporting blocks.

'6. .A Concrete floor form comprising the combination with a supporting' frame consisting of a pluralityY ot spaced supporting beams, of a plurality of form pans of a length `slightly less than the space between supporting beams7 said pans having down-` wardly turned longitudinal edges one of which is provided with a flanged laterally extendingportion adapted to interlap with the edge ot an adjarent pan to define joist arranged transversely to the supporting beams; blocks removably secured upo-n the sides of the supporting beams to enga-ge and support the ends of the interlapping edges clear of the sides of the bea-ms whereby the pans may be removed without disturbing the supporting structure: l and auxiliary pans supported above the beams, said aux iliary pans being shapedv to conform to the shape of ther form pans and being arranged to extend across the beams and lap the adjacent edges of the form pans;

7. A concrete door form comprising the combination with a supporting structure consisting of a. plurality of spaced support ing beams, of a plurality of form paus ot a length slightly less than the space between supporting` beams, said pans havingv their edges downwardly turned4 to form slightly flaring side portions; a laterally extending portion formed upon the lowerI edge of one of the ,side portions; an upwardly turned flange formed upon the edge of said laterally extending portion to interlap the lower edgel of the side portion of an. adjacent form pan whereby the side portions'of adjacent pans are held in spaced relation to define floor oist arranged transversely to the supporting beams g blocks secured upon the sides of the beams'to receivesand support the ends of the laterally disposed portions whereby the form pans are supported clear of the sides of the beams to permit the removal of said pans wit-hout disturbing the supporting structure; and auxiliary pans supported above the beams and lapping the adjacent edges of the form pans.

8. A concrete floor comprising the combination with ya supp orting structure consisting of a plurality of spaced supporting beams, of a plurality of'form pans ot a length slightly less than the space between supportmUv beams, said pans` having their vedges downwardly turned to form side portions; a laterally ex-v tending portion formed` upony the edge of one ofthe side portions of each pan, each laterally extendingp'ortion beingy flanged to interlap with the side portion of anadjacent form pan tok define fioor joist arrangedtransversely to' the supporting beams; bloeks secured uponv the sides of the beamstoreceive andsupport the endsoff the laterally disposed yportions whereby the tor-m pansare supported clear ofthe beams te permit the removal of said pans without disturb ing 'the supportingl structure; and auxiliary pans supported above the beams andl lapping the adjacent. ends of the form pans, said auxiliary pans being shaped to conform to the form paus and having apertures adjacent the edges thereof to register with apertures formed' adjacent the edges of the laterally disposed 'portionof the form pansv ,whereby the lapping'edfges may be fastened to the supporting blocks byy a common securing element;

9. In a concrete floor form, form pan consisting of a met-al1 sheet having the Iongitudinal edges thereof bent to -form side portions one of said side portions being further bent to form an outwardly extending lateral extension ladapted to engage the adi jacent side portion of an adjacent 'form pan to form a mold for` fioor joist.

l0. In a concrete floor form, a form pan consisting of a metal sheet lravingthe lon'- gitudinal edgesthereof bent to form side portions o-ne of which has its edge Vfurther outwardly bent to form a laterally extending portion; and a flange formed'upon the outer edge of the lateral extending 'portion to interlapwith a side portion of an` adja-` cent pan to form a mold for floor j oi'st.

l1.- In a concrete fornn a: form pan consisting of a metal sheet havin-g the longitudinal edges thereof' bent to form side portion one of which has its edge further outwardly bent to form a laterally extending portion substantially parallel to the sheet, said side portions flaring outwardly sligl'itly from perpendicular relation to said sheet;

and an upwardly turned flange formed upon the edge ofthe laterally extending portion to interlap with the adjacent edge of 'an 'ad-i` jacent pan to form a mold' for floor jfo-ist.

In witness whereof I hereunto set my' signature.

RAYMOND Cl IPHELPS.A 

